/*
 * #%L
 * SwiftUICommonUtilities
 * $Id:$
 * $HeadURL:$
 * %%
 * Copyright (C) 2011 - 2012 Linkwithweb
 * %%
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as
 * published by the Free Software Foundation, either version 3 of the 
 * License, or (at your option) any later version.
 * 
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 * 
 * You should have received a copy of the GNU General Public 
 * License along with this program.  If not, see
 * <http://www.gnu.org/licenses/gpl-3.0.html>.
 * #L%
 */
/**
 * 
 */
package com.linkwithweb.products.swiftui.utils;

import java.security.Security;

import javax.crypto.Cipher;
import javax.crypto.spec.SecretKeySpec;

/**
 * @author KUMARA
 * 
 */
public class EncryptionUtils {
	public static void main(String[] args) throws Exception {
		Security.addProvider(new org.bouncycastle.jce.provider.BouncyCastleProvider());
		byte[] input = "www.java2s.com".getBytes();
		byte[] keyBytes = new byte[] { 0x00, 0x01, 0x02, 0x03, 0x04, 0x05,
				0x06, 0x07, 0x08, 0x09, 0x0a, 0x0b, 0x0c, 0x0d, 0x0e, 0x0f,
				0x10, 0x11, 0x12, 0x13, 0x14, 0x15, 0x16, 0x17 };

		SecretKeySpec key = new SecretKeySpec(keyBytes, "AES");

		Cipher cipher = Cipher.getInstance("AES/ECB/PKCS7Padding", "BC");

		System.out.println(new String(input));

		// encryption pass
		cipher.init(Cipher.ENCRYPT_MODE, key);

		byte[] cipherText = new byte[cipher.getOutputSize(input.length)];
		int ctLength = cipher.update(input, 0, input.length, cipherText, 0);
		ctLength += cipher.doFinal(cipherText, ctLength);
		System.out.println(new String(cipherText));
		System.out.println(ctLength);

		// decryption pass
		cipher.init(Cipher.DECRYPT_MODE, key);
		byte[] plainText = new byte[cipher.getOutputSize(ctLength)];
		int ptLength = cipher.update(cipherText, 0, ctLength, plainText, 0);
		ptLength += cipher.doFinal(plainText, ptLength);
		System.out.println(new String(plainText));
		System.out.println(ptLength);
	}
}
